Machine and method for manufacturing bags



Oct.- ,21, .1941. H. H. GRHy I 2,260,191`

MACHINE AND METHOD 'FOR MANUFACTURING BAGS i Howard, H. Orr

ATTORNEY Oct 21, 1941 H. H. oRR I v 2,260,191

MACHINE AND METHOD FOR MANUFACTURING BAGS Filed May 3, 1938 10Sheets-Sheet 2 Hawr. H. Orr

ATTORNEY oct. 21,1941. n. H. RR 2,260,191

MACHINE AND METHOD FOR MANUFACTURING BAGS Filed May 3, 1958 l0Sheets-Sheet 3 Howard' H; Orr.. 1

INVENTQR ATTORNEY Oct.-21, 1941. H. H. ORR

MACHINE AND METHOD FOR MANUFACTURING BAGS Filed May 5, 1938 l0SheetS-She'et 4 Howara. ELI Orr.

nvr-:NTO BY @MZ Cl. ATTORNEY H. H. ORR

oct.. 21, 1941..

MACHINE AND METHOD FOR MANUFACTURING BAGS Filed May 3, 1938 10Sheets-Sheet 5 b Mdm mm# ZH H ow'a'ra. H. Orr

INVENTO ATTORNEY H. H. ORR

Oct'. 21,1941.

MACHINE AND METHOD FOR MANUFACTURING BAGS Filed May 3, 1938 l0Sheets-Sheet 6 INVENTR vl/ AT1-oan H. HQoRR Oct. 21', 1941.

2,260,191 MACHINE 'AND METHOD FOR MANUFACTURING BAGS Filed May 5, 19.581,0 Sheets-Sheet 7 H awa-ra, H. yfrr mvENToR H.. H. oRR

MACHINE AND METHOD FOR MANUFACTURING BAGS 1o sheets-sheet 8 Filed May 5,1938 Howard, H. Orr

n@ o T N NCR E o vm.. N T A Y B H. H. oRRl Oct. 21, 1941.

Filed May 3, 1938 1o sheets-sheet 9 Howard, H1011- I l mvEN-roR Oct. 21,1941. H. H. oR'R A MACHINE AND METHOD FOR MANUFACTURING BAGS Filed May5, 1938 El Q o l m ;:5 .mmf /S K u, ,H

vPatented Oct. 21, v'1941 MACHINE AND METH(?`I%B MANUFACTUR- Howard H.Orr, Cleveland, Ohio, assignor to The Jaite Company, Jaite, Ohio, acorporation of ING Ohio

Application May 3, 1938, Serial No. 205,771

(Cl. 1178-10) y standard bag manufacturing devices, by 4provid- 10Claims.

This invention relates to a machine and meth- Y od for manufacturingbags of the, so called,

closed end type, having a' small opening at one end to allow theintroduction of material therein, such bags'frequently are formed ofmulti-ply bag stock, and may or may not be provided with side gussets. c

Bags of this description may be formed from continuous multi-ply tubes,which are cut to requisite bag length in a, well known manner,

weight of the material against the valve, is

formed by tucking in or folding the upper gusset corner of the bag, in aWell known manner, and then a strip of tape is -sewn across the uppermargin of the bag to seal it.

The forming of such valves requires several distinctive time-consumingoperations, which may be performed by various means,vwell known to theart. This type of valve does not readily accommodate filling spouts ofall sizes, andV possesses a distinct disadvantage, in that it does notalways provi-de a leak proof bag, this disadvantage is especiallynoticeable when finely di.-

vided granular materials such as cement and the like, are packed in suchbags.

I have discovered that an -opening for the introduction of material, maybe provided along the upper margin of a tape sealed bag end, by simpleand effective-means, by merely offsetting the line of stitches insuchtape along the bag engaging margin thereof near" one side of thebag, in such manner that the stitches will continue to proceed throughthe tape, but will lie above the upper margin of the bag, and thus thatportion of the tape receiving the odset stitches ovrlies'v an unstitchedor open portion of the bag, through which material may be introducedinto the bag by means of a filling spout, or otherwise.

Such portion of the tape having the offset stitching means foroffsetting the line of stitching through the bag sealing tape andpermits the stitching operation toproceed continuously.

Somewhat similar results may be accomplished by folding or rolling overa corner of the bag and 'keeping it in such condition, lbefore thestitching operation proceeds along that portion of the bag.l This foldedover corner is then available for the'lling operation, and may be foldedback to its original position and secured to that part of the tapeoverlying the folded over corner, by any suitable means, as by stapling.sewing or by the use of adhesives.

Anothermeans for accomplishing much the same results, is by providing acut out portion along the top bag margin along one end, inv such mannerthat,the top margin of such cut out portion lies above the lower marginsof the tape and yet is below the line of the stitches, in order that thestitching may continuev in a straight line through the tape, wihoutengaging the margins of the bag, and thus an overlying portion of thetape unstitched to the bag, permits the llling ofthe bag, and maybesecured thereto, as above described. It, therefore, is an object of thisinvention, to provide in a bag machine, means for offsetting the line ofstitching through tape along a bag margin in such manner, that thesewing proceeds as a continuous operation. and yet is offset to sewthrough the tape only near one side of the bag without sewing the ltapeto the bag, and thus provide a filling means, such means being adaptedto be incorporated into existing bag machines, at a nominal cost.

Another object is to provide a bag machine adapted to simultaneously sewtape at both ends of the bag and to provide means for offsetting such'sewing at one end of the bag to provide means for filling the bag, suchsewing operations being conducted entirely automatically and at a highrate of speed. v

Another object is, to provide'means for manufacturing a bag having aportion. adapted to receive a filling spout. such means Abeing readilysecured to the bag in such manner as to prevent the leaking out of thebag contents therefrom.

Another object is to provide meansfor manufacturing bags having spoutreceiving portions the size of which may be quickly and easily varied inwidth.

Still another object is, to provide means for manufacturing a relativelylow cost bag, having a filling spout portion, such bag being adapted topackage a wide range of different materials such as cementand the like,and bituminous vmaterials, such as mineral pitch, asphalt and manyothers.

Yet other objects are to provide a simple economical'and practicalopening and closing device adapted` tovbe used for single-ply,multi-ply, y gusseted or plain bags and containers of many 'differenttypes.

Other and further objects of this invention will be apparent during thecourse of the following '4 ing toward the receiving end of the machine',

Fig. 4 is a fragmentary vertical section takenon the line 4-.4 of Fig. 2showing means for actuating the stapling attachment,

Fig. 5 is a partial sectional view of oneof the cutting knives forsevering tape,

Fig. 6 is a transverse sectional view of the'sewving head taken on theline 6`6 of Fig'. 2,

Fig. 7 is a transverse, sectional view taken on the line 1--1 of Figure6,

Fig. 8 is a partial plan view taken onthe line 8-'8-.of Figure 6 showingthe cam in one position,

Fig. 9 is a similar view showing the cam in another position,

Fig. 10 is a top plan view of a modified form of valve forming means, i.

Fig. 11 is an end elevational view of Fig. 10, Fig. 12 is an' enlargedvertical sectional view taken on the line |2|2 of Fig. 10.. i

-Fig. 13 is a'fragmentary prospective view of the valve formingattachment, taken on the linel |3-l3 of Fig. 10,'

Fig. 14 is a view similar to Fig. 13, showing a corner of a bagpartially folded,

Fig. 15 is a similar view -toFig. 13, showing a corner of a bag foldedover,

Fig. 16 is a perspective view of asingle ply,

stapling operations in place of sewing at one end sponding to Fig. 28,showing stapling in place Fig. is an elevational view of a bag with thecorner' cut away to forma valve, and

Fig. 31 is an elevational'viewof a bag-corre.- sponding to Fig. 3,showing stapling substituted for sewing.

Referring to the drawings, and more 4particularly Figs. 1 through 3, thebag machine constituting an illustrative embodiment of my invention,comprises a .suppprting frame 49 mounted on. supporting legs 4|supporting undercai- `riage 42 and table supports 43, while asub-support frame 44, located at the discharging end of the machine, anda sub-frame 4 located at one side of the machine, are cooperativelyconnected tofthe frame which mayr be made of aigle iron or any othersuitable material. A stapling device 46, adapted to insert staples `inbag ends in gusseted bag before thevalve forming mechanism has startedto'operate,

Fig. 17 is a perspective view of a single ply bag` after the rstmovement. of the valve forming` mechanism has taken place,

Fig. 18 is-a perspective view of a single ply bag',

after the second movement of the valve forming mechanism has takenplace,

Fig. 19 is a perspective view of `the valve after a well known manner,is mounted. on the subframe v45. A ilat plate 48 recessed 'toaccommodate endless chains 49, serving to convey the bags' after theoperator has placed them on the receiving plate 48, isdetachably securedto the receiving end of the machine byl suitable means; such as columns41. A gusset valving mechanism 50 is mounted on one corner of the plate48 which is fullydescribed in my Patent No. 1,926,241, issued September12, 1933, and therefore said mechanism is described in a general manner.

An axle 5|, suitably mounted on the supporting legs 4|, supports twojuxtapositioned sprockets 53, while an axle 52, Amounted on thesubsupport' frame 44', carries-two similar sprockets 54, aligned withthe sprockets 53, and positioned at opposite ends of the machine.-Endless belts .55.. operatively mounted on the sprockets 53 and 54,support bag conveying means in the form of a series of smallfspaced-wooden blocks 55a, having certain of said blocks 56 'raised atvpredeter- .mined distances apartlfrom each other corre` spending to thewidth of a bag, to receive and convey bags through said machine in thedirection indicated by the arrows on the drawings.

A base 51, of any suitable material, is mounted on the table support 43,while secured thereto are bags, and may be .of any well known design,and

Fig. 21 is a view similar to Fig. 2o, showing stapling operation at oneend,

Fig. 22 is Va perspective view of a plurality of modified. type of valvebags, being conveyed through'the machine, with sealing tape -being sewedover the ends,`

as suchvsewing heads are well knownin the art.

a detailed description of the same is omitted herein. A spline-shaft 62mounted centrally of the channel mounting58serves a purpose hereinafterdescribed. A pai!l of stands 64, adapted to support skeins of thread 65for the sewing f l heads 60 and 6|, are detachably mounted on a mountingplate '63 ysecured-to the base 51.

A pair of devices for severing the tape beyond the bag margins as shownin Fig. 5 are detachably mounted on mounting plate. I63, and as shown at66, comprise a pair of-pillow blocks 61, supporting a shaft 68 and gears69 and 10,`wh'ich operate cams 1|, which as best shown in F18. 5

actuates arms 12, pivotally mounted at 13, having fingers 14 adapted toengage the attened portions of a ratchet 15, formed integrally withcutting blades 16, rotatably mounted on a stationary circular plate 11,provided with a seg- Vment shaped aperture 18. The construction and vmechanism illustrated generally at 8|, and then passes through foldingdies 82, which may be of any well known construction, adapted to foldthe tape over the ends of a bag B.

Suitable motive power for operating the machine is furnished by anyelectric motor 83, driving spilneshaft 62 through a cooperating chainbelt 84, while a belt 85 drives axle 86, which in turn drives the axle52 through belt 81, thus,

of the contact arm ||8 forming contact on point 8"'-thus controllingmotor 83.

Sewing head 60, shown in Figs. 6 through 9, is similar to sewing head6|, and comprises generally a frame ||9 secured to a recessed base |20,and a connecting rod ,|2I, adapted to reciprocate a needle |22, forsewing folded sealing tape 19 to the opposite margins of a bag B. Asshown in Fig. 7, the base plate |20 is recessed at |25 in order to fitinto v-rails |a, provided along the top of the channel mountings 58,permitting the sewing head 60vto slide along the channel mountings 58.The lower marginal edges |26 of the channel mountings 58 ,are recessedto receive a rubbing block |21, secured to the base plate |20 by meansof spacers |28, and a pair of blocks |29 are secured to base plate |20,while another pair of blocks |30 are secured to the sides of the channelmountings 58, and a pair of -coil springs 3|, for returning the sewinghead to its normal position are mounted between blocks |29 and |30. Ablock |32, mounted on the front of actuating the endless belts 55, andthe wooden drives a sprocket 89 by means of a chain belt 90.

while a knurled roller 93 is driven by .a belt 92 cooperating with thesprocket 89. pair of spur gears 92' and 92" the gear 92" operablyconnected to shaft driven by the sprocket 89, mesheswith gear 92' whichcauses the chain belt .92 operating on sprockets to rotate the knurledroller 93 in direction of arrow. The axle 52 drives shaft 68 by means ofa belt 94. A gear 95, mounted on. the end of the shaft 86, engages gear96, while gears 91 and 98 cooperate withv gear 96 forming a transmissionunit, which drives'stapling device 46 and a cam ||3. Gear A| 00 isdetachably mounted on a shaft 99 for the purpose of synchronizing thespeed of the transmission unit. A sprocket |0|, mounted on the end ofshaft 99, as shown in Fig. 4, drives a shaft |02 by means of a belt |03,whilea circular finger holder |04 having radially extending fingers |05,is mounted on the shaft |02. The stapling device 46 is actuated by meansof an arm |06 moved Through a by the ngers |05 when the shaft` |02isrotated.

The number and position of fingers |05 determine the number of staplesinserted into a bag. and if desired,'the stapler 46 may be adjusted toinsert one staple-each time the arm |06 is actuated bly` the finger |05.A sprocket |01., as shown in Fig. l, is mounted on the opposite end ofthe shaft |02, which, by means of a chain belt |08 operates a sprocket|09 driving a shaft ||0, which in turn by means of gears :and ||2rotates the cam 3,as shown in Fig. 6.

The gusset-valving mechanism 50 is driven from the chain belt ||5,,mounted on axle 86, throughthe one revolution clutch ||4 which is4operated whenever the loperator actuates foot pedal ||6, while anotherfoot pedal ||1, is operable through connecting rod ||1' which in turn`connects the lever '||1 operating' on a center pivot, the other end oflever |'|1"\is connected to a rod H8" then d own to the contact arm ||8'of the starting switch ||8. When pedal 1 is depressed it puts intomotion the above linkage which in turny causes the downward movement lthe bas-e plate |20, is adapted to hold a roller |33.

which is disposed in juxtaposed relation to the cam |I3, which isadapted to retract the sewing head 60, as hereinafter described.

A keyway |34 is provided alongA the splineshaft 62, while slidablythereon is a gear'|35 having its collarrecessed at |36 to receive a yoke|31, secured to 'the b 'ase plate |20. Acgear |38 mounted on the ,frame||9, cooperates with gear |35to reciprocate the needle |22, in anobvious manner, whilev a key |39 is secured to gear |35, as by weldingindicated at |40. Fig. 8 illustrates the cam ||3 and associated partsinv one operative position, while Fig. 9 illustrates the same parts inanother.operative position, the bag B having the sealing. tape 19ffoldedaround its marginal edges. v

As the cam ||3 rotates and its surface |4| engages rollerv |33,` springs|3| hold the sewing lhead 60 to provide the normal straight line ofstitches, which sew the tape 19 to the top margin of the bag B asillustrated in Fig. 8, whereas Fig.

9 illustrates the position of the same parts when the cam I|3 has beenrotated so that its surface |42, bearing"gainst roller |33 carries thesewing head 60 away from its normal position, illustrated above,producing the row of offset stitches illus.- trated at |6I, wherein thestitches sew through the tape only just below 4the upper margin of thebag. l

As continued rotation of the cam |3 returns it to the position shown inFig. 8, the springs- |3| urge the sewing head 60 towards the oppositeend of the bag B, and the gear |35 has slid along the splined surface of-its shaft 62 and transmitted the rotation to gear |38, 4which causedIillustrated in Figs? 22, 23, and 27, and in order to manufacture suchltype lof bag, the lfiat plate 48- and gusset-valving mechanism 50 arere-' moved from the machine, and receiving'plate4 |43 and associatedmechanism |44 are suitably secured to the machine in place thereof, asshown in Figs. 10 through' 15. Such 'corner' folding mechanism comprises-a receiving arm |45 and a folding member |46, secured ,to a slidingblock |41, slidably mounted in a channeled block |48,

whilea coiled spring |49, connected tothe folding., member |46 and theblock |48, returns the'fold? .|46 has started its movement toward-thereceiving arm |45. Fig. 14 shows the folding member |46 partially movedtoward the arm |55, the corner of the tube T being partially lifted,while Fig. shows the completed movement with folding member |46 engagingthe tube T, which is valving mechanism 50. The stapling device 46 isslid back and sewing heads 50 and Bi are secured to the channelmountings 58. A tube T is then placed on the receiving plate |49, thepedal ||6 is pressed and a corner is folded over, forming a valve |59 bythe mechanism shown in Figs. 13 through 15. The conveyor belts 49 carrythe bag to conveyors 55 and, as shown in .Figl 22,

sewing heads 69 and 6| stitch the tape to the pressed against thereceiving arm |45, the corner of the tube T being folded'over, so thatthe tube T is ready to be conveyed to the part of the machine whichseals the bag ends after the folding member |46 is retracted. Thechannel |52 in the receiving arm |45 is provided for folding the cornersof tubes having a pluralltyvof plies, in order to accommodate theadditional thickness when folding.

The machine is also adapted to be operated to provide tucked in gussetvalves, formed in the upper cornerof a bag, of the type illustrated inFigs. 20, 21 and 26. Toproduce such bags the fiat plate 48, with itsgusset folding mechanism 50, is secured to the machine, the cam H9 isremoved and the stapling device 46 is slid back, and sewing heads 50 and6| are secured to the channel mountings 58. As the gusset-valvingmechanism is 'fully disclosed inmy Patent No. 1,926,241,

issued September 12, 1933, the same will be only briefly describedherein, and is shown in Figs. 1

through 3.

A holder |53, is provided for holding the tube T against the plate 48,and a pair of spreader fingers |54 are provided for opening the gussetoutwardly, into the position shown at |55 in Fig. 17, and a tuckingplate |55.. swinging pivotally, tucks the corner inwardly into the formshown at |51, in-Fig. 18. The holder |59 then releases the tube and itis conveyed into the machine with the valve formed as illustrated ai;|58 in Fig. 19, and rollers 9| and '93 crease the plies, to hold thevalve -in shape, as it passes between them. lThe above operations areinitiated by actuating pedal Hl to start the motor 83, then placing atube T on the fiat plate 48 and then actuating pedal ||6 which throughclutch H4 A vhesively secured thereto, as previously described yfand'the stitches are applied in straight lines, as a continuousoperation. For certain purposes the bag illustrated in Fig. 21 'may bedesired, wherein stapling device 4 6 is used to insert staples |61through the tape 19 along the bottom ofthe bag, in the place of thesewing head 6|, while, the normal stitching operation continuesalong thetop of the bag. A completed bag; after the severing- 4of the tape 19 bythe cutting device, is shown in bag ends in straight lines. For certaintypes of bagsthe stapling device 46 may be substituted for the sewingheads Aalong the top of the bag,

y as shown in' Fig. 23.

In order to produce a bag having offset stitching through the tape, ofthe type illustrated in Figs. 24, 25 and 28, any suitable receivingplate,

,preferably one' without any bag valve forming mechanism, is set uponthe machine and the sew- 'ing heads 60 and 6| are mounted on the channelmounting 58, the sewing `head 60 being reciprocably mounted for movementto and a'way from the bag end, as illustrated in Fig. 6, while thesewing head 6| is rigidly mounted for sewing in a straight line acrossthe bottom of the bag.

When the cam H3 is rotated to a certain point, asp previously describedherein, it reciprocates sewing head 60 outwardly sufficiently to producethe offset line of stitches illustrated at i6 l, wherein the stitchesthereof positioned parallel to the upper margin of the bag lie above theupper bag margin |62 and thus such "stitches extend through the tapeonly, without touching the bag margin |62, and. such portion ofthe tape19 mayv be lifted therefrom for a filling operation, and may be securedto the bag margin by any suitable means, as by sewing, stapling or thelike, after the bag is filled, to provide a neat appearing leak-proofbag.

Continued rotation of the cam I3 results in the sewing head 60 returningto its normal position in time to sew across the top of the next bag,`

line of stitching above described. The numberA of staples to be insertedis regulated by the number of fingers |05, positioned on the fingerholder |04, which is operated as previously described, and illustratedin Fig. 4. Straight line of stitching by sewing head 6|, is produced atthe bottom of the bag. Fig. 29 illustrates a completed bag of thistype.

Somewhat the same type of bag may be produced by cutting out a portionof the upper corner of the bag indicated by the numeral |66 in Figs. 30and 31,v in such manner that the normal" l straight li'ne of stitchesalong the top margin of In order to produce a completed bag havinganotherreceiving plate |49 and associated mechthe bag, ,sews through thetape and bag, exceptwhere the bagels cut out-at |66, where the stitches'proceed through "chev tape only, which provides a bag filling opening,as above described,

type of bg, varying from the above by the sub-` 1 stitution of a row ofstaples |61 for that part of the above described stitching which sews j.through, the tape and bag, and by terminatingthe row of staples at thepoint where the offset stitching commenced, thus leaving a part of thetape 19 available for filling of the bag.

It will be apparent to those skilled in the art that the inventionherein disclosed may be variously changed, usedor modied withoutdepartbag by said conveyor means, for causing said Y, stitching means to"sew said strip to the top of each bag from one side wall partially.across said bag end and from there to sew through said strip onlybeyond the top bag margin near the y fold thereof to the opposite bagside, for the purstrip entirely across said bag end, and offsetting rsaid row of strip stitches for a part of the distance along the bag endin such a manner that such stitches extend through the strip only be-Lyond the bag end near the strip fold, thereby prolying the bag end, forthe purposes described.

viding an initially unsecured strip portion over'- 2. A method ofmanufacturing bags from flat ,L

tubular bag stock, comprising: folding strips of flexible material overthe top and bottom margins thereof,'sewing said strip to a part of thetop bag and by a row of -stitches extending continuously through said'strip entirely across said vbag end, and offsetting said row of stripstitches for a part of the distance along the bag end in such a mannerthat such stitches extend through the strip only beyond the bag end nearthe fold thereof, and simultaneously sewing-said strip along the bottombag margin thereby providing an initially unsecured strip portionoverlying'the top bag end, and a permanent material holding seam alongthe bag bottom.

3. In a machinev for making bags from fiat tubular bag-length stock,conveyor means for conveying a series of bags through saidmachine,4

poses described.

6. In a machine' for making bags from iiat tubular bag-length stock,conveyor means for conveying a series of bags through said machine,means for folding a strip of material over the top bag margin, means fordriving said conveyor means, stitching means for sewing said folded overstrip of material to the top bag margins, means for severing said stripbeyond the sides of said bag, an'd means also driven by said drivingmeans for causing a relative movement between each bag and saidstitching means as each bag j is advanced by said conveyor means tocause. said stitching means to sew said strip to thetop of each bag fromone side wall partially across the bag end and from there to sew throughsaid strip only beyond the top bag margin to the opposite side thereof,Ythereby providing an initially unattached strip portion permitting abag lling operation.

7. In a-machine for'making bags of thetype described, conveyor meansfor. conveying a series of bags sidewise through said machine, means fordriving said conveyor means, reciprocably mounted stitching means forsewing a folded-over stripof material to said "top bag margins, adaptedto be reciprocated towards and away from the top I vends of said bags asthey are advanced by said to cause 'said stitching means toOsew saidstrip A to the top of each bag from one side wallpartially across thebag end and from there to sew through said strip only vbeyond the topbag margin to the lopposite side thereof, thereby providing an initiallyunattached strip portion permitting a bag filling operation. Y

4. In a machine for making bags from fiat tubular bag-length stock,conveyor means for conveying a series of bags'through said machine,means for folding a strip of material over the top bag margin, means fordriving said conveyor means, stitching means forv sewing said foldedover strip of material to the top bag margins, and means also driven bysaid driving means for causing a relative movement between eachA bag andsaid stitching means as each bag is, advanced by said conveyor means tocause said stitching means to sew said strip to the top of conveyor, andmeans also driven by said driving means for reciprocating said stitchingmeans in synchronized relation -to the movement of bags through saidmachine, and causing said stitching means to sew said strip to each bagend partially across the bag vtop and from there to sew through saidstrip only beyond the top bag margin to the opposite side thereof,l forthe purposes described. 8. In a machine for making bags of the typedescribed, conveyor means for conveying a series of bags sidewisethrough said machine, means for driving said conveyor means,reciprocablymounted stitching means for sewing a folded-over strip of material tosaid top bag margins, adapted to be reciprocated towards and awayfromxthe top ends of said bags4 as they are advanced by said conveyor,and a rotating cam also driven by said driving means for reciprocatingsaid stitching means in synchronized relation to the movement of bagsthrough said machine and causing said each bag from one sidev wallpartially across the posite side thereof, thereby providing an initiallyunattached strip portion permitting a bag filling operation.

y bag end and from there to Asewthrough: said strip only beyond the topbag margin to the opstitching means to sew said strip to each bag andpartially across the bag top and from there to sew through said striponly beyond the top bag margin to the opposite side thereof', for thepurposes described 9. In a machine for making bags of thetype.

described, conveyor means for conveying a series of bags sidewisethrough said machine, means for driving said conveyor means,` a supportmember adapted to be reciprocated towards and away from the top ends ofsaid bags as they are adv vanced by said conveyor, a stitching means 5.In a machine for making bags from flat'` ,tubular ,bag-length stock,conveyor means for conveying a series of bags through said machine,-`

means for driving said conveyor means, stitching means for sewing afolded over strip of material to the top bag margins. and a rotating camalso.,

driven by said driving means for causing a relative movement betweensaid stitching means in synchronized relation to the movement of eachmounted on said member for sewing a folded,- over strip dit` material tosaid top bag margins,

and means also driven by said driving means for -reciprocating saidmember and stitching means in cam cooperating with said follower member0n said support member, and also driven by said driving means, forreciprocating saidsupport member and stiching means inpsynclironizedrelation to the movement of bags through said machine for causingsaidstitching means to sew` said strip to each bag end partially across thebag top and from there to sew through said strip only beyond the top bagmargin to the opposite sidev 10 thereof, for the purposes described.

HOWARD H. ORB

